I was checking out the "Your Ad Here" link and noticed that the cost per click on the Adbrite ads for this site is about 69 cents. An overture bid tool search (http://uv.bidtool.overture.com/d/search/tools/bidtool/) of some appropriate keywords (WordPress, WordPress hosting, blog hosting) turned up prices starting at about 10 cents (for "WordPress") and running up to about 78 cents (for "blog hosting"). This is not a complaint but whoever's in charge of these ads might want to tinker a bit with the pricing and see if you can sell more. Of course, the cost per click could change after the ads have been running longer.
Given the number of comments I've seen on here from people proud of themselves for blocking the ads, as an advertiser I would also be worried about click fraud advertising here. (I'm still personally considering advertising here because it's a double payoff - get the ad and support the product. )